Big construction closures and detours coming to Randolph Road

Big construction closures and detours coming to Randolph Road

Starting the week of August 9, Pepco’s contractor is projected to mobilize on Randolph Rd. from Parklawn Dr. to Nebel St. to begin excavation of the 27’x40’ entry pit for the micro- tunnel operation, which is part of the construction of a new Pepco substation. Upon completion of the entry pit, the subcontractor will begin one of two micro- tunnels needed to go under the CSX Railroad tracks to complete the duct bank installation then proceed constructing the second micro-tunnel. This will be followed by the installation of conduit and pump grout throughout both micro-tunnels.

The total duration for the set-up and construction of both tunnels is projected to be completed within six months. Please note, duration dates are subject to change due to weather and permitting requirements.

Pepco is in continued coordination with the Montgomery County Department of Transportation to mitigate traffic overflow with minimal disruptions as possible. The traffic control plan will allow East bound traffic only on Randolph Rd. West bound traffic will be detoured down Parklawn Dr. to Rockville Pike-MD-355Sidewalks on Randolph Rd. will remain open to pedestrians throughout the duration of the micro-tunnel construction. 

While working during the permitted hours, flaggers will be posted to help coordinate traffic going to local businesses. All traffic control measures will remain in place 24/7 until the work is completed.

Please feel free to reach out to Shamyra Edmonds, Project Ombudsman directly for any questions or concerns about the White Flint Substation project at 202-643-3148 or

Amy Ginsburg


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